Interface HashedUri

A hashed reference to another assertion within the same manifest. Mirrors the shape the c2pa-wasm WasmCredentialHolder builds from c2pa-rs's HashedUri (see packages/c2pa-wasm/src/wasm_credential_holder.rs).

interface HashedUri {
    alg?: string;
    hash: Uint8Array<ArrayBuffer>;
    url: string;
}